To raise £1m for veterans' mental health charity Combat Stress, the 23-year-old British cyclist is attempting a 38,000 mile trip around the world over three years — without creating any carbon emissions.

Of course, it is virtually impossible to do anything without creating carbon emissions of some sort, but Kevin's aim is more about avoiding internal combustion than reducing his carbon footprint to zero. Maybe some rewording is in order, but it is hard to fault the goal.

He will be cycling when on land and sailing when on the sea — no fuel needed, and no direct emissions.

"It may not be easiest way, the quickest way or even the cheapest, but there is always a zero-emission choice," he said when I spoke to him recently.

"The only time I will be creating emissions will be when cooking. Everything else is battery powered and I'll recharge all electrics with solar chargers."

Of course, there will be an environmental impact in producing his food, spare parts and equipment, but we can't all stay at home, afraid to venture outside for fear of generating emissions, can we?

For the trip Kevin will be using a 2008 Specialized Rockhopper with an Extrawheel trailer to carry his equipment.

This adds a lot of storage space, which is useful, because this trip is unsupported and Kevin will be camping and cooking for himself wherever possible.

Before coming up with the plan, Kevin had been studying digital animation at University in London, and was contemplating taking a gap-year.

"I've never been one to take the easy or simple route, so flying to Thailand and sitting on a beach for a couple of months just didn't cut the mustard," he explained.